added nodes.

nodes/services/ntxicommand.h

@@ -0,0 +1,52 @@
+#ifndef NTX_ICOMMAND_H
+#define NTX_ICOMMAND_H
+
+#include <ntxinode.h>
+#include <memory>
+
+namespace ntx
+{
+
+  // Einfache Struct für Clipboard-Eintrag
+  struct NtxNodeEntry
+  {
+    NtxNodePtr clone;              // Elternloser Deep-Clone
+    NtxNodeWeakPtr originalParent; // Schwache Referenz für Undo
+    size_t originalPosition;       // Position im Original-Parent
+  };
+
+	using NtxNodeEntryList = std::vector<NtxNodeEntry>;
+
+  class NtxICommand
+  {
+  public:
+
+    virtual ~NtxICommand() = default;
+
+    virtual bool execute() = 0;
+    virtual bool undo() = 0;
+
+    virtual bool canExecute() const = 0;
+    virtual bool canUndo() const;
+
+    virtual NtxString getDescription() const;
+
+  protected:
+
+    NtxICommand() = default;
+    NtxICommand(const NtxICommand&) = default;
+    NtxICommand& operator=(const NtxICommand&) = default;
+
+    void setDescription(const NtxString& description);
+
+  private:
+
+    NtxString m_description;
+  };
+
+  using NtxCommandPtr = std::shared_ptr<NtxICommand>;
+  using NtxCommandUPtr = std::unique_ptr<NtxICommand>;
+
+} // namespace ntx
+
+#endif // NTX_ICOMMAND_H